diff --git a/actuasim.py b/actuasim.py
index d3bd3b56c0c80246692c7d5569274ecf33f2e63a..0df73ecfd64b351c6f7def87934ceceedf57f86d 100755
--- a/actuasim.py
+++ b/actuasim.py
@@ -150,7 +150,12 @@ class Actuasim(QMainWindow):
 
     def frame_received(self, frame):
         self.logger.info('Frame received:' + str([hex(h) for h in frame[0]]))
-        decoded_frame = knxnet.decode_frame(frame[0])
+        try:
+            decoded_frame = knxnet.decode_frame(frame[0])
+        except Exception as e:
+            self.logger.info('Bad frame: {}'.format(e))
+            return
+
         if decoded_frame.header.service_type_descriptor == knxnet.ServiceTypeDescriptor.CONNECTION_REQUEST:
             self.logger.info('= Connection request:\n' + str(decoded_frame))
             conn_resp = knxnet.create_frame(knxnet.ServiceTypeDescriptor.CONNECTION_RESPONSE,
diff --git a/actuasim/blind.py b/actuasim/blind.py
index ac9f7d95f2196542226f4633447e0dbf217266ad..587b9517754fd3949637b53c8244f7f8a9014842 100644
--- a/actuasim/blind.py
+++ b/actuasim/blind.py
@@ -23,14 +23,14 @@ class BlindWidget(QWidget):
     def __init__(self, individual_address, group_address, blind_position=0, animation_speed_ms=1500):
         super(BlindWidget, self).__init__()
 
-        self.ui = Ui_Blind()
-        self.ui.setupUi(self)
-
         self.logger = logging.getLogger()
 
         self.individual_address = individual_address
         self.group_address = group_address
 
+        self.ui = Ui_Blind()
+        self.ui.setupUi(self)
+
         # Progressbar init
         self.is_moving = False
         self.animation_speed = animation_speed_ms
diff --git a/actuasim/knxserver.py b/actuasim/knxserver.py
index 4d634b93da0377957478e3c3156805a83120d25b..430ac4a3e1972a9b093a0f4b17e3e8460b150835 100644
--- a/actuasim/knxserver.py
+++ b/actuasim/knxserver.py
@@ -45,4 +45,4 @@ class Knxserver(QObject, threading.Thread):
 
 if __name__ == '__main__':
     serv = Knxserver()
-    serv.start()
\ No newline at end of file
+    serv.start()
diff --git a/actuasim/valve.py b/actuasim/valve.py
index 7634b2aa52b5ce1baef82d398819701bd3cddf86..755bd6c16c4f4ab47d793c526f5fc421314cfcdd 100644
--- a/actuasim/valve.py
+++ b/actuasim/valve.py
@@ -25,14 +25,18 @@ class ValveWidget(QWidget):
 
     def __init__(self, individual_address, group_address, valve_position=45, animation_speed_ms=1500):
         super(ValveWidget, self).__init__()
-        self.ui = Ui_Valve()
-        self.ui.setupUi(self)
 
         self.logger = logging.getLogger()
 
         self.individual_address = individual_address
         self.group_address = group_address
+
         self._position = 0
+
+        self.ui = Ui_Valve()
+        self.ui.setupUi(self)
+
+
         self.position = valve_position
         self.setFixedWidth(220)